What kind of chick has...........................

I just came home from the local farm store and of course, they have their chicks. (have had chicks for over a month now). They have some that came in that are called "rainbow chicks" (all pullets), which in other words; they are chicks left over at the hatchery, that they just grouped all breeds together and sent them.

What kind of breed is the chick white with one or two black spots on it?